JavacardOS will not accept order any more, please contact our partner Feitian online Store:
https://ftsafe.en.alibaba.com/index.html

the max size of atomic transaction buffer

JavaCard Applet Development Related Questions and Answers.
Post Reply Previous topicNext topic
Rasiand
Posts: 12
Joined: Mon Mar 14, 2016 8:25 am
Points :133
Contact:
Contact Rasiand

the max size of atomic transaction buffer

Post by Rasiand » Wed Jun 29, 2016 4:36 am

As we all know, atomic transaction buffer is used to log changes in order to help JCRE rollback in case of failed command. But I don't know the max size of this buffer. Could I just beginTransaction and never invoke commitTransaction ?

Thanks
Top
wousim
Posts: 14
Joined: Tue Feb 16, 2016 10:12 pm
Points :109
Contact:
Contact wousim

Re: the max size of atomic transaction buffer

Post by wousim » Thu Jun 30, 2016 1:59 am

It‘s set by the card manufacturer.

There are several methods in the JCSystem class that can do this - getMaxCommitCapacity and getUnusedCommitCapacity.
Top
Rasiand
Posts: 12
Joined: Mon Mar 14, 2016 8:25 am
Points :133
Contact:
Contact Rasiand

Re: the max size of atomic transaction buffer

Post by Rasiand » Thu Jun 30, 2016 3:23 am

wousim wrote:It‘s set by the card manufacturer.

There are several methods in the JCSystem class that can do this - getMaxCommitCapacity and getUnusedCommitCapacity.


If I know nothing about the max size of this buffer, Can I just beginTransaction and never invoke commitTransaction ?
Top
wousim
Posts: 14
Joined: Tue Feb 16, 2016 10:12 pm
Points :109
Contact:
Contact wousim

Re: the max size of atomic transaction buffer

Post by wousim » Fri Jul 01, 2016 9:34 pm

You'd better not do this! You may either receive 0x6F00 or have your transaction rolled back.
Top
Post Reply Previous topicNext topic

Return to “Questions & Answers”

Who is online

Users browsing this forum: No registered users and 78 guests

JavaCard OS : Disclaimer